The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1999
Filed:
Nov. 04, 1996
A Fred Elsasser, Cincinnati, OH (US);
Henkel Corporation, Plymouth Meeting, PA (US);
Abstract
An improved, optimized industrial process has been found for the hydrogenation of organic nitrites into primary amines, which essentially consists of contacting a dried charge of at least one organic nitrile, aqueous alkali metal hydroxide, at least one Raney slurry hydrogenation catalyst, water and hydrogen for an effective time and at an effective temperature and pressure, wherein the improvements comprise eliminating the steps of drying the charge and adding water and reducing the required water to about 0.2%. Secondary and tertiary amine formation is low, as is moisture content and neither precious metals such as rhodium, nor strategic metals, such as cobalt nor ammonia gas nor solvents are required. Surprisingly, it has been found that water levels less than that taught in the prior art are effective at suppressing secondary and tertiary amine production, while still producing repeatable product on an industrial scale and with reduced cycle time, energy and catalyst charge.